2004 Toyota Prius Toyota Prius 2004

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2004 Toyota Prius repairs by problem area

Engine (39%)

Transmission and Drivetrain (3%)

Brakes and Traction Control (3%)

Suspension and Steering (12%)

Electrical and Air Conditioning (32%)

Paint, Rust, Leaks, Rattles, and Trim (4%)

Other (6%)

Chart based on 232 repairs.
See TSBs and recalls for the 2004 Toyota Prius.

2004 Toyota Prius engine repair cost distribution

$2500+ (4%)

$1000 - $2499 (6%)

$500 - $999 (15%)

$100 - $499 (48%)

< $100 (27%)

Worried about potential repair costs? An extended warranty can provide peace of mind.

Chart based on 85 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.

2004 Toyota Prius

Engine not specified

113000 mi

US $300
broken exhaust pipe; repair caused rattle fixed by dealer 

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2004 Toyota Prius 4dr Hatch

76-horsepower 1.5L I4 Hybrid CVT FWD

129000 mi

US $453
Failure of the Inverter pump 
261700 mi

US $30
Engine began missing, running rough. MIL came on in 20 miles. Replaced spark plugs to correct. They had at least 68K miles on them, the amount I put on the vehicle. 
307500 mi

US $16
Engine began missfiring and MIL (malfunction indicator lamp) came on indicating same. Replaced spark plugs, previously done at 260K. 
334000 mi Misfire on #2 spark plug/cylinder. In pulling the plug, found clear water (not coolant or oil) around the plug and ignitor. Dried everything off, did the same for #1, and swapped plugs. Cleared the alarm. No further difficulty; no parts replaced (plugs have under 50K on them). 
145000 mi

US $1500
Water pump was replaced. 
189000 mi

US $900
HV Battery died. R&R Battery. Works fine now 
117000 mi

US $500
Replace faulty inverter coolant pump for main battery recharge system. P0A93 computer code. 
118000 mi

US $275
Hybrid Battery cooler pump failed. 
155000 mi

US $380
I.C. Engine water pump.Remove and replace. 
130000 mi

US $450
Water pump replaced. Impellor bearing bad 
214500 mi

US $999
Hybrid battery failed after 215,000 miles. Went to a local service that installs re-manufactured batteries. Repair only took a couple hours. Car drives great now and gets better gas mileage. 
270000 mi

US $320
Pinging during half throttle going up hills. Throttle body and intake had carbon that may have been affecting fuel mixture. Components cleaned. 
272000 mi

US $85
Low engine power DTC, caused by a loose battery ground connection. Faulty ground caused engine to run rich, damaged the catalytic converter. Still need to be addressed. 
306000 mi

US $500
Cat and spark plugs replaced. Resolved pinging problem experienced since 2014. 
323000 mi

US $300
Hybrid battery failed. Replaced battery with a used battery 
326000 mi

US $1800
Traction battery was replaced with a lower mileage battery. 
385000 mi

US $250
Thermal storage pump failed and was replaced. 
159000 mi

US $685
Hybrid (traction) battery replaced with one from 2007 wreck with 67000 miles. 
76000 mi

US $176
Original water pump was leaking, so replaced water pump. 
96000 mi

US $545
P1121 code, changed coolant valve and also replaced gas hose and gas cap also replaced gas hose and gas cap 
112600 mi

US $3900
Battery failed, and had to get new Battery. Instead of replacing dead cells, replaced entire battery. 
189000 mi

US $300
Replaced one of the coils 
161000 mi

US $3000
Replace Hybrid Battery Pack 
20000 mi warranty software upgrade possible recall 
56000 mi

US $600
water pump for electric motor failed 
154380 mi

C $10
Car was idling rough and threw a code of misfire. Used carb cleaner to clean up intake egr area. Problem was resolved. 
160580 mi

C $150
routine maintenance: changed spark plugs, PCV valve and MAF sensor. 
135000 mi

US $5200
Hybrid Battery was replaced Engine was replaced 
156000 mi The hybrid battery was replaced on warrenty 
22673 mi Dash warning lights on. Codes P0A60, P0A63, P0A72, P0A75, P0A7A, P0A78, P3212, P3222. Coolant leaking inside Inverter housing. Replaced Inverter. (Possible indication of MFD issues with that many codes?) 
44044 mi

US $422
Check engine and dash warning lights on. Codes for Inverter cooling system, high voltage ECU, and ABS-TRAC system. Repaired frayed wire to Inverter cooling pump. (Possible packrat damage or more evidence of intermittent MFD problems?) 
44121 mi Check engine light on. Error code P043A. Replaced water pump assembly. 
6262 mi Technical service bulletin. Replaced fuel filler tube. Reprogrammed ECU. 
7210 mi Check engine light on. Fixed leak in fuel evaporation canister. 
85000 mi

US $500
Replace water pump. 
264000 mi

US $500
POA280 code. Replaced hybrid drive battery with one from a wreck. 
120000 mi

US $810
I got the red triangle of death and had the car towed to my dealership. It ended up being that the car was almost out of oil 
128000 mi

US $250
Leakage from the dealer installed recall water pump required install of new pump. 
147600 mi

US $360
Craig's List ad for main battery repair due to lower charging over several months and unusual charge rates. Check performed on all cells and two replaced. Solved inconsistency noted in battery feedback and MPG improved to 49 from 44. 
152000 mi

US $450
Had main battery checked and replaced three of 28 cells. Charging of battery had been rapid cycle indicating a problem which was resolved 
155200 mi

US $1770
3RD RESOLUTION OF WEAKENING DRIVE BATTERY. BOUGHT NEW G3 BUILT ON G2 FRAME FROM NJ SUPPLIER. INSTALLED BY LOCAL MECHANIC WHO DID FIX #2 REPLACING 3 ELEMENTS IN NOV 2015, 
67000 mi

US $350
Inverter Pump...ordered but not yet replaced|car is in shop now. Also(after being told the car was safe to drive until part came in) 12V battery failed on interstate|lost all power and car automatically shifted into neutral|had car towed 
95480 mi

C $50
Water pump (the one for the ICE engine) preventive replacement, sign of light leaks, changed under warranty. 
105480 mi

C $200
One ignition coil was full of water. When the engine was warm (lean combustion) engine was knocking very hard, misfire on cylinder #1. The ignition coil has been replaced (95$ part + 1 hour work) and the problem has been solved. 
115000 mi

US $460
While the car was at the dealership for an oil change, we were told that the inverter coolant pump was noisy and needed replacing. The car was taken to an indy shop, who said that there was no problem with the inverter coolant pump. 
96000 mi

US $200
Water pump leaking. Water pump was previously repaired under recall. 
151000 mi

US $1200
Replace hybrid water pump and leaking radiator. 
119040 mi

C $100
Fuel injection system needed to be adjusted and cleaned. 
124000 mi

C $300
Water pump was leaking - needed to be replaced. 
90200 mi Inverter pump failed, replaced under extended warranty. 
196000 mi

US $2000
HV battery failed at 194k miles. High RPM when accelerating. SOC fluctuated rapidly. MPG OK. Later the dashboard lit up - P0A80 code. ReInVolt (NC) supplied a refurbished battery for $1600 to my Dealer (CT) who installed it for $400. 
200000 mi

US $40
Car refused to start with error codes. Reset by disconnecting 12v to get going and drove to AutoBeYours in southern Indiana. He found a HV battery connector had not been fully clicked home at my dealer when they installed the HV battery. 
280000 mi

US $300
Rear Muffler - Hole in exhaust pipe 
45000 mi Inverter Water Pump. Car not driveable. Parts had to be ordered. Took 2 days for parts to arrive and 1 day to install. 
106000 mi

US $400
Gas engine water pump was considered leaking by the dealer. Not noticed by owner. 
110300 mi

US $346
Water pump and thermostat had to be replaced 
134997 mi

US $2600
Hybrid Battery Replaced. Car 14 years old. Low mileage. Claimed it was because of age. 
144000 mi

US $470
Inverter cooling control valve replacement (check engine light came on) 
57040 mi

C $44
Check engine code P0138 post-catalytic converter O2 sensor. Part ordered. 
58900 mi

C $400
Dealer replaced O2 sensor, but check engine light still came on. I then purchased a ScanGauge for $170 to clear and diagnose the problem. 
61380 mi

C $366
Check Engine light P0031 fixed by replacing air-fuel ratio sensor. I purchased the replacement sensor over the Internet since dealer price was high. 
116560 mi

C $730
Replaced oxygen and air/fuel sensors to clear check engine light.  Also replaced a leaking exhaust gasket. Dealer also replaced inverter cooling pump at no cost (recall). Replaced brake fluid (maintenance item). 
141020 mi

C $350
Replaced stainless steel muffler since it had developed a hole. 
213665 mi

C $202
Exhaust shield above catalytic converter rusted and loose. Dealer secured it. 
218860 mi

C $200
Dealer fixed loose heat shield in the rear (different one than before) that was rattling 
230038 mi

C $93
Check Engine Light, codes P0011, P0012, P0016 -- intermittent at first then continuous. Car ran fine. Replaced Camshaft Timing Oil Control Valve. No more Check Engine Light. 
170000 mi

US $450
Leaking water pump Leaking radiator 
82000 mi Many warning light Coolant pump failure. 
112000 mi Repaired in June. Car died on road. Wichita Toyota dealership replaced a fuse to repair,charged $240 service advisor lied as to which fuse I later found out. Replaced faulty cooling pump myself. 
173000 mi

US $200
The traction battery went bad. I got a new battery from a 2007 Prius with 26k miles from a junk yard. The battery was 400 and Toyota gave me 150 back for the old battery. I will also sell the battery ECU for maybe 50. 
131000 mi

US $650
One of the water pumps (not under warranty) failed. This resulting in an overheating warning popping up on the car screen. Water pump was replaced. 
114000 mi

US $350
Engine Water Pump replaced (technician noticed leak, and I had read they should be replaced in the Prius at ~100K). Noticed during inspection. 
164000 mi

US $147
I brought the car in for its standard 5000 mile oil change, tire rotation, and inspection. The inspection revealed drive belt appeared cracked/worn, so I opted to replace it. 
110000 mi Inverter coolant pump failed. Dealer replaced the pump at no charge due to Toyota Limited Service Campaign for Inverter Coolant Pump. 
98580 mi Water pump changed after replacing the serpentine belt. The dealer suggested the replacement of the ICE water pump after seeing light coolant leak. The change was done under warranty. The dealer did the replacement on my second Prius too. 
71000 mi

US $380
Had to replace cooling system for hybrid system. Inverter I believe they called it. Later recalled and reimbursed. 
90000 mi

US $400
Replace water pump for gas engine 
139000 mi

US $400
Diagnose poor heater, replace one thermostat 
127000 mi

US $360
Ice was making more noise than usual, mentioned it when getting scheduled oil change, mechanic said bearings were going out on the water pump, replaced the belt as well. Purrs like a kitten now. 
176000 mi

US $480
Inverter coolant pump failed. Electric pump caused fuse to blow and system shutdown. Repaired in one day by dealer. 
101000 mi

US $400
Replaced inverter coolant pump 
123000 mi

US $300
Water pump early stages of failure (noise, binding, leaking). Replaced water pump and engine coolant. Also replaced water pump belt, spark plugs, PCV, oil/filter, air filter, and rotated tires. 
126000 mi

US $350
Hybrid Inverter Coolant Pump Failure (DTC P0A93). 2nd failure (first in June, 2008). Managed to limp home, then to dealer. 
66000 mi

US $700
Water pump (main) was 'crusted over'. 
114000 mi Inverter coolant pump failed, Inverter temps got too high and CEL lit. Care did not operate at full power, lost AC. Had Recall notice in car but hadn't had it performed prior to event. Repaired at no cost. 

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2004 Toyota Prius Engine Problems

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